In Disney/Pixar's Up(2009) Carl and Ellie are shown hammering nails and sawing wood on their wedding day. This is a once popular euphemism cleverly disguised as innocent enthusiasm to fix their dream home.
In Alien, the blue lasers seen in the egg chamber belonged to the Who. The band was rehearsing and testing lighting gear on the neighboring soundstage and lent them to Ridley Scott, who felt it would add to the scene's atmosphere.
In The Disaster Artist (2017), when Tommy steps out of the limo at the premiere, in the background we can see that Marcus, the man Tommy hired to document The Room, is still following and filming Tommy
In “Avengers: Age of Ultron” when Ultron is negotiating with Klaue over vibranium, Klaue says “It came at great personal cost” and rubs the brand on his neck given to him by the Wakandans. This neck brand is also shown in Black Panther.
At the end of The Shawshank Redemption, the DA who arrests Guard Captain Hadley reads the Miranda rights off a card. This scene takes place in 1966, the same year as the Miranda v. Arizona court case that required these rights to be read to a suspect upon arrest.
In Billy Madison, Danny McGrath’s (Steve Buschemi) “People to Kill” list contains various film crew members including producer (Bob Simonds), assistant to the producer (Helen Ackerley) and production designer (Perry Blake).
At the begging of I, Robot detective Spooner is seen doing morning exercises to strengthen the upper arm and shoulder. Its later discovered that the lower half and parts of the upper half of his arm are robotic.
Inglorious Basterds has a great shot where Mélanie Laurent is juxtaposed with a poster featuring Diane Kruger's character. They both are looking down & troubled. It's more powerful considering what the outcome is for both of the ladies at this event.
Gene Wilder agreed to Willy Wonka under this condition “I walk toward the crowd with a limp. The crowd sees I am cripple. As I walk my cane sinks into a stone I’m walking on and I realize I don't have my cane. I fall and before I hit the ground, I bounce up to applause.”
The Snowpiercer is the story of Moses. Here is moses, leading his people from bondage. All the scenes are there. I realized when the train hits the drift, its alluring to parting the red sea. The notes represent the commandments, the last train car before the engine is the sin at Mt Sinai.
In Men in Black, the bug in Edgar’s body asks about the cat at the morgue, saying, “It means worlds to me.” He said “worlds” and not “the world”, because of the galaxy contained in the cat’s collar.
In the early parts of 10 Cloverfield Lane, the lamps and paint color of the walls in her holding cell symbolize how she’s being kept in the dark about what happened, and only he knows what’s going on outside and why she’s truly in the bunker.
In The Secret Life Of Walter Mitty during one of Walter's daydream scenes, Walter tackles his boss Ted Hendricks through a skyscraper window and they land in the bed of a "Hendricks Destruction" truck.
In “look who’s talking” (1989) Molly’s Mom says the only people who get artificially inseminated are ugly or lesbians. Later when she gets in James’s taxi and tells him that’s how she got pregnant, he reply’s with “are you a lesbian” implying he’s attracted to her.
Near the beginning of Signs  we hear Mel Gibson's character asking his friend, and probably former parishoners, Lee to have a talk with his miscreant son; "Even if it wasn't him [who made the crop circles]." Later we see Lionel filling out enlistment paperwork in the recruiters office.
In Blade 2, Scud is wearing a B.P.R.D. t-shirt. The logo and acronym stand for the Bureau for Paranormal Research and Defense. This is the organization Hellboy belongs to. The director of Blade 2, Guillermo Del Toro, went on to direct Hellboy and its sequel, Hellboy II: The Golden Army.
In Return of the Jedi when we first see everyone celebrating at the end, Leia is seen with her hand on Han's shoulder as he looks down, comforting him as they don't know yet whether Luke and Lando have survived
In “Hot Fuzz”, Angel says that they’re called traffic collisions, not accidents, since “accident implies no one is to blame.” Later, Danny says his mom died in a collision. This foreshadows later in the film, where we learn that she drove her car off a cliff after losing Village of the Year.
Rogue One : In addition to General (Hera) Syndulla being paged on the Rebel base's PA system, the "Star Wars: Rebels" droid, Chopper, can be seen, and briefly heard, rolling out of frame.
In Goodfellas, Henry brings some fur coats to Sonny, which he can’t do anything with fur in the summer. “We’ll hang them in the freezer with the meats”. Frankie brings attention after the heist by buying his wife a fur coat. As punishment, they hang him in the freezer, like a fur coat
Street Fighter: (1994) Ever wonder why E. Honda & Zangief's fight has audio from King Kong vs Godzilla? It isn't just a fun, little reference, both movies were distributed by Universal in the states.
In Age of Ultron, the first thing Tony Stark does when checking out the tractor is to make sure the gear-shift is in neutral, the very first thing to do in the real world when fiddling with tractors.
In Revenge of the Sith Obi Wan gets the high ground, Anakin attempts to attack him, and Obi Wan wrecks him. In Return of the Jedi Luke gets the the high ground in the throne room and Vader simply chucks his lightsaber at Luke.
The name of the dragonfly in The Rescuers (1997) is Evinrude, which is also the name of an outboard boat engine brand. This alludes to when the character Evinrude functions as a motor boat engine and propels the makeshift boat.
In the Crimes of Grindlewald trailer. Dumbledore is the only one who pronounces Grindlewalds name correctly (Grindlevald). He does this because the two where great friends and of course Grindlewald was german.
The bomb Syndrome attempts to kill Mr. Incredible with at the waterfall is shaped like the "Incredible I" logo of Mr.Incredible's old suit. Not only is this symbolic of Bob's past catching up with him, but it's also probably something Buddy created when he hoped to become Incrediboy.
In Taxi Driver (1976), a few references are made of Travis Bickle's service in the armed forces: when asking for a job, he says he was a marine; his green M-65 field jacket; but probably the subtlest hint is how he rolls up and packs away his sleeping bag during the day, like any good soldier would.
In Pulp Fiction (1994) every time Vincent Vega (John Travolta) goes to the bathroom, something bad happens. When he comes out he finds himself in a totally different situation than before.